GRIGORYAN, D.A. ON MAIN CANONICAL NOTION OF $ \delta $-REDUCTION. Proceedings of the YSU A: Physical and Mathematical Sciences, Yerevan, Armenia, v. 52, n. 3 (247), p. 191–199, 2018. DOI: 10.46991/PYSU:A/2018.52.3.191. Disponível em: https://journals.ysu.am/index.php/proceedings-phys-math/article/view/vol52_no3_2018_pp191-199. Acesso em: 14 may. 2024.